ElasticSearch集群API

柔情只为你懂 2023-10-01 18:27 19阅读 0赞

# `一、获取节点信息` #

# 需要指定节点名称，地址或_local
    GET `http://localhost:9200/_nodes/_local`
    
    # 或者
    GET `http://localhost:9200/_nodes/127.0.0.1`
    
    # 响应
    {
        
       "cluster_name":"elasticsearch", 
       "nodes":{
        
          "Vy3KxqcHQdm4cIM22U1ewA":{
        
             "name":"Red Guardian", "transport_address":"127.0.0.1:9300", 
             "host":"127.0.0.1", "ip":"127.0.0.1", "version":"2.1.1", 
             "build":"40e2c53", "http_address":"127.0.0.1:9200",
          }
       }
    }

# `二、集群运行状况` #

# 集群运行状况
    # 此API用于通过追加health关键字来获取集群运行状况的状态。
    GET `http://localhost:9200/_cluster/health`
    
    响应
    {
        
       "cluster_name":"elasticsearch", "status":"yellow", "timed_out":false,
       "number_of_nodes":1, "number_of_data_nodes":1, "active_primary_shards":23,
       "active_shards":23, "relocating_shards":0, "initializing_shards":0,
       "unassigned_shards":23, "delayed_unassigned_shards":0, "number_of_pending_tasks":0,
       "number_of_in_flight_fetch":0, "task_max_waiting_in_queue_millis":0,
       "active_shards_percent_as_number":50.0
    }

# `三、集群状态` #

# 通过附加`state`关键字URL来获取有关集群的状态信息。
    # 状态信息包含:版本，主节点，其他节点，路由表，元数据和块。
    GET `http://localhost:9200/_cluster/state`
    
    # 响应
    {
        
       "cluster_name":"elasticsearch", 
       "version":27, 
       "state_uuid":"fefe748eet15fe",
       "master_node":"fe546546489fe",
    }

# `四、群集统计信息` #

# 此请求使用`stats`关键字检索有关集群的统计信息。 
    # 此请求返回碎片编号，存储大小，内存使用情况，节点数，角色，操作系统和文件系统。 
    GET `http://localhost:9200/_cluster/stats`
    
    # 响应
    {
        
       "timestamp":1454496710020, "cluster_name":"elasticsearch", "status":"yellow",
       "indices":{
        
          "count":5, "shards":{
        
             "total":23, "primaries":23, "replication":0.0,"
          }
       }
    }

# `五、正在等待的群集任务` #

# 此API用于监视任何集群中的挂起任务。任务类似于创建索引，更新映射，分配碎片，故障碎片等。
    GET `http://localhost:9200/_cluster/pending_tasks`

# `六、集群重新路由` #

# 此API用于将分片从一个节点移动到另一个节点，或者用于取消任何分配或分配任何未分配的碎片。
    POST `http://localhost:9200/_cluster/reroute`
    
    # 请求正文
    {
        
       "commands" : [ 
          {
        
             "move" :
             {
        
                "index" : "schools", "shard" : 2,
                "from_node" : "nodea", "to_node" : "nodeb"
             }
          },
    
          {
        
             "allocate" : {
        
                "index" : "test", "shard" : 1, "node" : "nodec"
             }
          }
       ]
    }

# `七、群集更新设置` #

# 此API允许使用settings关键字更新群集的设置。
    # 有两种类型的设置 
    #  - persistent(在重新启动时应用)
    #  - transient(在完全群集重新启动后不会生存)

# `八、节点统计` #

# 此API用于检索集群的一个节点的统计信息。节点状态与集群几乎相同
    GET `http://localhost:9200/_nodes/stats`
    
    #　响应
    {
        
       "cluster_name":"elasticsearch", 
       "nodes":{
        
          "Vy3KxqcHQdm4cIM22U1ewA":{
        
             "timestamp":1454497097572, "name":"Red Guardian", 
             "transport_address":"127.0.0.1:9300", 
             "host":"127.0.0.1", 
             "ip":["127.0.0.1:9300]"
          }
       }
    }

# `九、节点hot_threads` #

# 此API可用于检索有关集群中每个节点上当前热线程的信息
    GET `http://localhost:9200/_nodes/hot_threads`
    
    # 响应
    {
        Red Guardian} {
        Vy3KxqcHQdm4cIM22U1ewA} {
        127.0.0.1}{
        127.0.0.1:9300}Hot threads at 
       2017-02-01T10:59:48.856Z, interval = 500ms, busiestThreads = 3, 
       ignoreIdleThreads = true:0.0% (0s out of 500ms) cpu usage by thread 'Attach Listener'
          unique snapshot
          unique snapshot